Fly Fishing Seasons on Utah's Green River
The Green River in Utah is widely considered one of the very best trout fly fishing destinations in the world. The amazing scenery and thousands of fish per mile that happily rise for dry flies, make the Green River a Bucket List river for anglers of all skill levels. Please use the following information to help you decide which seasons might be best to fish her waters.
Spring Fly Fishing on Utah's Green River
Spring is often considered the most productive time of year for fly fishing on Utah's Green River. As warmer water is released from the Flaming Gorge Dam, trout metabolism increases significantly, triggering the most consistent aquatic insect hatch of the year: the Blue Wing Olives (BWOs). These insects start appearing in March and continue through late May, with peak hatches typically occurring from mid to late April during cloudy weather conditions.
May offers amazing opportunities to hit the first terrestrial dry fly fishing of the year. Cicadas show up almost every year in early May, with some years their presence being the trouts main focus. The period before the onset of high water offers outstanding fly fishing with minimal river traffic. We are only given 3 days notice as to when high water will begin, the anticipated flow levels and predicted duration. Over the past 10 years the average date for the start of high water is May 25th. May is a great time for a last minute trip.
March
As temperatures begin to climb, the fly fishing in early spring really picks up. Trout become eager to feed on larger Blue Wing Olive (BWO) mayfly nymphs, making March a great month for nymph fishing. In addition, opportunities for dry fly fishing with midges are plentiful on the A Section and upper B Section. Streamer fishing on the lower parts of the river can be outstanding, offering some of the most consistent conditions of the year.
April
The Green River fishes as well as any other river in the lower 48 states in April. Being a tailwater fishery, we do not get the muddy snow runoff which so many other rivers are susceptible to. Whatever your preferred method of fly fishing may be, April on the Green River provides some of the best fly fishing anywhere. With remarkable hatches, high catch rates, and the chance to stalk individual rising fish, fly fishing on Utah's Green River in April is truly special.
Hatches:
Blue Wing Olive (BWO"s) #16-18
Midges size #20-24
Black Stoneflies #14
Terrestrial Insects - grasshoppers, ants, cicadas, crickets, & beetles #10-16
Best Techniques:
Dry Fly: Fish to rising pods of trout during the morning midge hatch. Look for hundreds of trout rising during a blanket BWO Hatch which occur on cloudy days around 1pm. The first Terrestrial dry fly fishing of the season also starts when temperatures start creeping into the mid 70's.
Nymph: deep runs & pools (7-10 feet deep)- The trout will move into shallow water and over moss beds mid day when the BWO nymphs begin to emerge
Streamers: fish slowly - in the Spring they fish best in the pool tailouts and on the lower sections of the river.
May
The Green River fishes excellent in May before and after high water. High water typically begins around May 20th and lasts about 2 weeks. However, every season is different due to weather and snowpack. Some of the largest trout of the season are caught during high water as all trout in the Green are displaced by the high flows. Being a tailwater fishery, the Green clears up relatively fast and good fishing usually resumes 2 days after the first day of high flows. Blue Wing Olives, trout eagerly awaiting terrestrial insects, large trout chasing streamers, and a chance at hitting the cicada hatch are all a part of the Green River in May.
Best Fly Patterns:
Parachute Adams #16-18
BWO Cripple Paterns #16-20
Spotlight Midge black, grey #16-20
PMX Parachute Cricket #12-18
Cicadas #8-10
Beefus BWO Emerger #18-22
Fat Albert tan, black #8-14
Grey Scud #18-22
Tungsten Zebra Midge black, brown, wine #18-20 Wooly Buggers black, gold, white, olive #4-8
Articulated Circus Peanut ginger, olive, black, white #2
RS2 gray, wine #16-22
Wire Worms in Neon during high water #6-10
Summer Fly Fishing on Utah's Green River
There are not many places in the world that have better dry fly fishing than the Green River in the Summer. The river is situated on the Eastern edge of the Uinta Mountains in a very dry high desert setting. This unique area holds an incredible variety of terrestrial insects all of which the trout happily search for. Long drifts with floating fly patterns will produce lots of opportunities for anglers of all skill levels.
June
The Green River is world famous for the prolific cicada hatch. The cicadas begin to emerge when the ground temperature reaches the mid 60's. This can occur anytime from early May to mid June. The mature cicadas live for about 1 month after emergence. Cicadas are not very accurate flyers and frequently land in the water causing explosive strikes from eager trout. June also brings notable hatches including Caddis, PMD Mayflies and Yellow Sally Stoneflies. These hatches typically start in late June, and the early stages are more prolific on the B and C sections. Additionally, grasshoppers, ants, and beetles become a part of the trout's diet. Check out our Terrestrial Insects page for fly fishing tips and more dry fly info.
July
In July, the Green River presents a feast of terrestrial and aquatic insects for the abundant trout. July provides the driest conditions of the year in eastern Utah. This dry weather allows the entire 30 miles below Flaming Gorge Dam to be crystal clear - most of the time. The clear water helps spread anglers and rafters out and the lower sections of the river fish very well. Early July to mid July offers the chance to catch the tail end of the cicada hatch, along with the peak activity of Yellow Sally Stoneflies, Caddis, and PMD mayflies.
August
The Green River in August is synonymous with warm weather, excellent fishing, and healthy trout. By this time in the season all of our guides are very dialed into where the trout are holding. August fishes very well with grasshoppers, flying ants, and beetles. We also get a great Trico hatch on the lower sections of the river as well. In late August the kids are back in school and river rafting traffic drops significantly. August is a very consistent month on the Green River.
Hatches:
Terrestrial Insects - all shapes and sizes
PMD's #14-16
Yellow Sally Stoneflies #14 -16
Cicadas #4-10
Mormon Crickets #2-4
Caddis Flies #14-16
Best Techniques:
Dry Fly - Some of the best dry fly fishing anywhere in the world occurs on the Green River in the summer. Remember to let the trout eat your fly before setting the hook. Hiring one of our premier fly fishing guides will give you ample opportunities at fish.
Nymphing runs & pools (about 7 feet deep) - The trout will move into shallow water and over moss beds around 10am when the nymphs begin to move around. Dry-Dropper rigs are also very effective
Streamers fished early in the mornings, at dusk and in cloudy weather or in the shade. They can also be great on the lower river if the water clarity is off color.
Best Fly Patterns:
PMX Parachute Cricket #8-14
Chernobyl Ants black, brown, tan #4-12
Card's Cicada #8-10, #4-6
Beefus PMD Emerger #14-16
Fat Albert black & tan #6-14
Morrish Hopper tan, pink #8-14
Yellow Sally CDC & Elk #14-16
Vis-a-Dun PMD #14-16
Tungsten Zebra Midge brown, disco, wine #14-16 Wooly Buggers black, gold, white, olive #4-8
Sex Dungeon black, olive, ginger, white #2
Triple Double black, amber, purple, olive #10-16
Elk Hair Caddis #14-16
Sailor Ant brown & black #12-18
Snookie brown, tan, black #8-12
Iron Sally #14-16
Scud grey #20
Fall Fly Fishing on Utah's Green River
Autumn on the Green River can be a very productive time of year to fly fish. As brown trout prepare for their spawning season, they begin to feed more aggressively to pack on weight for winter,. Streamers are particularly effective during this period, especially in October and November.
Additionally, the river experiences substantial hatches of Tricos and Pseudocloeon (tiny Blue Wing Olive mayflies), which draw trout into dense groups. These hatches, peaking in September, provide exceptional sight fishing opportunities for those targeting wary trout.
September
With kids returning to school, river traffic decreases significantly! September on the Green River is characterized by warm weather, excellent fishing, vibrant autumn foliage, and healthy trout. This month, the river fishes exceptionally well with grasshoppers, flying ants, and beetles. Additionally, the presence of Tricos and small Blue Wing Olives provides fantastic sight fishing opportunities.
October
Solitude, and trout in spawning colors are part of what makes October on the Green River special! The weather may be 70's or snowing so be prepared. Dry flies will fish well on warm days. The brown trout start getting extra aggressive towards other fish, and their colors become very vivid. This is a great time of year to hone your streamer fishing skills!
November
November offers an excellent opportunity to observe brown trout as they engage in spawning behavior. You can witness hundreds of trout paired up, protecting, and excavating their spawning beds. Due to their heightened aggression during this time, fishing with streamers can result in some exciting visual action. Additionally, "Indian Summers" are quite common in November, allowing for large terrestrial dry fly fishing during these warm spells. These conditions create perfect opportunities for terrific dry dropper fishing. The late Fall is a great time of year to catch trout with lots of solitude!
Hatches:
Blue Wing Olive (BWO"s) #18-22
Midges size #20-24
Terrestrial Insects - grasshoppers, ants, crickets, & beetles #8-18
Best Techniques:
Dry Fly - Brown and tan colored flies fish very well in the Fall. Hoppers, sailor ants, beetles, and Royal Wulffs, and small BWO patterns..
Nymphing runs & pools (about 7 feet deep) - There are lots of trout in shallow water and over moss beds.
Streamers fished early in the mornings, at dusk and in the shade. Also effective fished on a nymph rig. Very effective later in the Fall as the brown trout stage up for the spawn
Best Fly Patterns:
Parachute Adams #18-20
BWO Cripple Paterns #18-20
Spotlight Midge black, grey #18-20
Beefus BWO Emerger #18-22
Fat Albert tan, black #8-14
Grey Scud #18-22
Tungsten Zebra Midge black, brown, wine #18-20 Wooly Buggers black, gold, white, olive #4-8
Articulated Circus Peanut ginger, olive, black, white #2
RS2 gray, wine #18-22
Parachute Hoppers tan, olive #8-14
Beetles brown, black #14-18
Sailor Ants brown, black #10-16
Royal Wulff #14-20
Triple Double black, amber, purple, olive #10-16
Snookie brown #8-12
Winter Fly Fishing on Utah's Green River
Winter fly fishing on the Green River offers a serene and tranquil experience. Although river flows can vary significantly during this season, our seasoned guides know precisely where to take you to make the most of your day. Streamers, small nymphs, and midge dry flies are all effective for fishing in these conditions. This a great time of year for a last minute trip - look for those warm weather days for the best action.
December
December provides great midge hatches, as well as opportunities to catch aggressive brown trout on streamers. Bald eagles are frequently seen on the river this time of year, and human sightings are rare!
January
With river temps in the upper 30's the trout tend to group together - if you find feeding fish stay there. Trout taking your fly will hit very soft no matter which method of fly fishing you are using. If you are nymphing be ready to set on any strange or subtle movement of your indicator.
February
Day time highs in February occasionally reach the mid 50's. Look for awesome midge hatches on these days. February can also be very good for streamers - especially on those warm days.
Hatches:
Midges size #20-24
Best Techniques:
Dry Fly: Look for subtle rises to locate the pods of surface feeding fish. Delicate presntations are usually needed to entice fish feeding on midges
Nymph: deep runs & pools (7-10 feet deep)- The trout strikes will be soft so set on any little movement
Streamers: fish slowly - typically fish best in the fast water or on the lower sections of the river.
Best Fly Patterns:
Spotlight Midge black #20-24
Mating Midge #20-24
Parachute Adams #20-24
Gulper Special black #18-20
WD40's wine, grey, black #18-24
Barr's Emerger #22-24
RS2 olive, wine, grey #20-22
Glo Bugs peach, orange, pink, green #14-18
Soft Hackle grey #18-24
Scuds gray, olive #14-22
BWO Beefus Emerger #18-22
Tungsten Zebra Midge brown, black, wine, purple #14-20
Wooly Buggers black, gold, white, olive #4-8
Triple Double black, purple #16-18
Muddler Minnow #6-10
Ginger Bunny #6-10
